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一场积雪能否对牧区造成灾害是由多因子综合作用的结果，不同的雪灾因子在积雪成灾过程中所起作用的大小是不相同的。文章分析了牧区雪灾因子体系，并利用主成分分析方法对多个雪灾因子进行了主成分分析，结果表明，在已形成的雪灾因子体系中，一场积雪的最大积雪深度、积雪日数、降水总量和最大风速是主成分。此结果对建立雪灾判别及预测等应用模型都有重要的意义
Whether a snow disaster can cause disaster to pastoral areas is the result of a combination of multiple factors. Different snow disaster factors play a different role in the snow catastrophe process. The paper analyzes the system of snow disaster factors in pastoral areas, and uses principal component analysis to make principal component analysis of several snow disaster factors. The results show that in the system of snow disaster factors, the maximum snow depth of a snow cover, snow days The total precipitation and the maximum wind speed are the main components. This result is of great significance to the establishment of application models such as snowstorm discrimination and prediction